{
  "manageEntity": {
    "action": "Save",
    "entityId": "1276357944",
    "entityType": "Track",
    "nonce": "0xac6a85edd1ccdf948832a52909a35a3caf71e4211f4b9f627aa0f9f4cc6cc839",
    "signature": "0x05c32601660b003cee1fb5edc6abe54052e2d9b54c4d010b8f4ce0704789f2755e62a262854753d67ceafb05bf38003829cd1c5f92fa59604c9a80b46731938d1c",
    "signer": "0x84B42609E987DD0953e02498E61987fB833B7C92",
    "userId": "887547386"
  }
}