{
  "manageEntity": {
    "action": "Save",
    "entityId": "88007",
    "entityType": "Track",
    "nonce": "0xdf8829b05e5e8ccb4b4c768ca66411260de60e4ef4e61030866808f88b3c8c85",
    "signature": "0x21a2789bf8be23d7c207c8bfa23740bcd3754ed57ebdc7d899908c8afac9ed501d79249c44cf52e2ee63c11927e1c95f955984b82479fb5f0610701ded685e3a1c",
    "signer": "0x84B42609E987DD0953e02498E61987fB833B7C92",
    "userId": "887547386"
  }
}