{
  "manageEntity": {
    "action": "Save",
    "entityId": "513005483",
    "entityType": "Track",
    "nonce": "0x209ba86fd598141fb4fce314510fb399ba33fe46bd6710febf4d7b0f8985a6c7",
    "signature": "0xaff658bf612c3c47596ea51615d700c06aca1864fa8e322bcb7c01fe4ed5f5a15b34b1355dde88ca84f182d2a6e0eb714236bd57e20d07785dd324f972e009aa1b",
    "signer": "0xAaC77705f5f6bd787D8581c36Ddaf7c0c7AE3370",
    "userId": "827420993"
  }
}