{
  "manageEntity": {
    "action": "Save",
    "entityId": "1848806037",
    "entityType": "Track",
    "nonce": "0x6fe2f6a804ccc03ef44ea72dba62bf1bcbff3caa133623b5e9f3015b2f384d93",
    "signature": "0x31d0dae0a68b61678e43c86e42a0f0414f1e8a9c7f6b9dec9a2815aa8104bc1e6b972bebb5f83b4160cfd288c03c0b173cb3ce3da83f598201aac600b9eba51d1c",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}