{
  "manageEntity": {
    "action": "Save",
    "entityId": "229881323",
    "entityType": "Track",
    "nonce": "0xe8fa3d60aa22f89c384ba526cf6cdeb4879f5c547420d3aa31e28aeb25890ea5",
    "signature": "0x8d4eeab0b802ab416e84b240eef1afb96fe74bf079f7aa00188f122b97d9a8bc4b8478026620c09d3f97d245f18d6b49df48ed8df6b4b71f3788053089a77af41b",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}