{
  "manageEntity": {
    "action": "Save",
    "entityId": "222444",
    "entityType": "Track",
    "nonce": "0x058d4dbbc81425cd99c33883c3a9e0823e0a7fb9405beb7eae13861ae7db7d61",
    "signature": "0x56ca706bc6f990e81c13b0526ad1a1cc8d02ca622bcbe460c9ba18dcae5259f2772edf2664e20458ae9b8592e02ebdc6db3414abed52039b8fd74e66b8a7e0451b",
    "signer": "0x766d742Cc35188990Dc38CaD8006DEcEe3fAFed5",
    "userId": "353834"
  }
}