{
  "manageEntity": {
    "action": "Save",
    "entityId": "845494597",
    "entityType": "Track",
    "nonce": "0x10328cba9c9c957108340d31d957b8d5519182c97c0add71e457afad75facfae",
    "signature": "0x9a4ec2f86c1a77cc825e0c9b11a507051af9842b84aae8b29df848e13fb4fac81385dbda058b2f5f8410839d5524441916da9297d0453d21e8214bdd9a62347e1c",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}