{
  "manageEntity": {
    "action": "Save",
    "entityId": "860000484",
    "entityType": "Track",
    "nonce": "0x8c2a8fca39c569f3f233fb364d5d81a8ee8c97a4a6d9fbfe8ecc45cad1ae9c17",
    "signature": "0x5b0fc04317c2c42b2359fe0247ba42a4f54c825e36a4016536b8f8753d8aa01b0c0cc9d169a8ae7db4db9c3c3397ddccaca0911f8ae6ed2487a944ce1a5f92011c",
    "signer": "0x84B42609E987DD0953e02498E61987fB833B7C92",
    "userId": "887547386"
  }
}