{
  "manageEntity": {
    "action": "Save",
    "entityId": "956735963",
    "entityType": "Track",
    "nonce": "0x6dacc22037d168e7b65bb9f1ac01baa6a2a575221f089e61b709b24f4618e2f7",
    "signature": "0xb3a42886a3e6e72911b8c47a09434abe21465725ff5cfe75d35960b273076ba04b182d512c013b413980c2504c334ab3d9229bbc167fd7185ad28ee6459647501c",
    "signer": "0x2D566E1DaC6fc148a694abe846B32e39B6584aa5",
    "userId": "890889753"
  }
}