{
  "manageEntity": {
    "action": "Save",
    "entityId": "186614248",
    "entityType": "Track",
    "nonce": "0x20141325906f8936915b7a87de71afdd7ed224c92d0c3fc1c6fd08a6bf3f538f",
    "signature": "0x7a8a508f9001470af8d261c707b5592857e3d2c60e955a380ebbc7184cbf3a5e016ddb0f61aaf86bea471673bb185c4d7e3dd41532f2fd1ba9f341a1b9f856701c",
    "signer": "0xbe916820AF010608151C80f3A74F7c83218094B2",
    "userId": "881446128"
  }
}