{
  "manageEntity": {
    "action": "Save",
    "entityId": "2075237461",
    "entityType": "Track",
    "nonce": "0x65bee089521dc241576b33280da383b53f12a9df98c92ac7c64820e4a6116222",
    "signature": "0x484330857515dea0a81daff16436fc6a81105e657c0479c03cfb944ecbed30e4448b3533bbbb8f1e8ae0d8a20f19edf856064a844afae178fc245b44c801d0b01c",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}