{
  "manageEntity": {
    "action": "Save",
    "entityId": "1459127693",
    "entityType": "Track",
    "nonce": "0xcf353c7d17bf7d772f009a8b432bedd7303e755edd2797e6930144a3594f48fd",
    "signature": "0x9caa5836e616095aca151aa8a7d2a9e0ebbcf1a328a19e0d67a7a278b9e2895f154e01ac264d0c1ebb0828a9e54094210cbd25948ef5a89f7587f672bda1582e1b",
    "signer": "0xF2c19977A72e7f63bBbD9063748E52c002b22f6b",
    "userId": "957488166"
  }
}