{
  "manageEntity": {
    "action": "Save",
    "entityId": "1173780582",
    "entityType": "Track",
    "nonce": "0x443f52d8d12a992f87613420f2e4db4c15b29ba6c85ede66f4718bc1bd0808c9",
    "signature": "0x8bc2b1b0b3de7e5d1d27d5add7df4602501463c74055ad96deaf4785acedd41948f06f1144c592215a55a273f2399b3a459962b8bcf7ebba997749dc8685b74f1c",
    "signer": "0x84B42609E987DD0953e02498E61987fB833B7C92",
    "userId": "887547386"
  }
}