{
  "manageEntity": {
    "action": "Save",
    "entityId": "709635944",
    "entityType": "Track",
    "nonce": "0xf3aa13457cc4ebe5be94f5356be050e6e82b910a19e85d35ed8534704df276b0",
    "signature": "0x3f31caa458b526dda8e4a863bbe0439a2e57c290bf3e82b54fcc5b522d0f7dad5d307af72784c7a93e7a96eb446217f20dcd2331372da214f9f793ff2325e8421b",
    "signer": "0x84B42609E987DD0953e02498E61987fB833B7C92",
    "userId": "887547386"
  }
}