{
  "manageEntity": {
    "action": "Save",
    "entityId": "1915136343",
    "entityType": "Track",
    "nonce": "0x62b50fe43a65153129e3519590d0e19679119e4c04bfddda9447ae059fc6fc2c",
    "signature": "0x6e6da6c09752d03923b7937c819f55c5bde65505a6816c8f5d678d3bd28107f966e73a822211015553198c911dc68f07baa9869e2445a77752b4eb399589ad751c",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}