{
  "manageEntity": {
    "action": "Save",
    "entityId": "273698",
    "entityType": "Track",
    "nonce": "0xc8c55a940ba1bef9f6c803e01062c1aba975ad87d1c83dd37aca0d251690e6f5",
    "signature": "0x99453dd1b6080fd2661441d23c280ec683de01262b337c28bcfc6006f53a16011be76f1e4f15682def915c7cb2e9ac070170c2dc93966de4530805aee3c32dcd1b",
    "signer": "0x84B42609E987DD0953e02498E61987fB833B7C92",
    "userId": "887547386"
  }
}