{
  "manageEntity": {
    "action": "Save",
    "entityId": "1922468469",
    "entityType": "Track",
    "nonce": "0x0f5940ce19fcef60e47972d3017d92c3e6d37d0df2ba812f67341abae1bf80d0",
    "signature": "0x40356ef511b029c8568392a7fd97e0f3df6a22695b0921b9dedcefbe1975da8a4fe6f3104bb5882b31f2594d42a300a6f794f04d22dbbb988861a9b79127e54b1c",
    "signer": "0xbe916820AF010608151C80f3A74F7c83218094B2",
    "userId": "881446128"
  }
}