{
  "manageEntity": {
    "action": "Save",
    "entityId": "1536646543",
    "entityType": "Track",
    "nonce": "0xa9470a0c78f83781f7d3d73418f89b9f8af695e752f8816c80109c2328f7cd10",
    "signature": "0xba96358f67d7ca0ec639e0285a53e86cd42a9b611f81a369a93843eb7d62eb4f16a582f38824cd82454e6d8c0c09450c45a72afc60cea69965ea0930b0aceb401b",
    "signer": "0x7Fa5a67C00c48DCA54f12c80579B583FcD79a330",
    "userId": "527480232"
  }
}