{
  "manageEntity": {
    "action": "Save",
    "entityId": "1855317597",
    "entityType": "Track",
    "nonce": "0xa6299afd8417236104028f1c757ef029a59b75280ca37573c5ec62f99487d0c7",
    "signature": "0xb1e60ddb13e7c92c7a3d571a77a580ba3c25eb77313cc9f6f4d3a86e5fa83dc807664b7773e548b1592e9994071ba8304516a9ddd820f9960ff294b1f2ae5b9a1b",
    "signer": "0xA5fFfA5b8673Fb93490E3F9B0BeE58e1f0Ce1231",
    "userId": "508186998"
  }
}