{
  "manageEntity": {
    "action": "Save",
    "entityId": "1971282664",
    "entityType": "Track",
    "nonce": "0x8ce92e953d53c66ff734f1b4a1b0f0433f312c3ac8bc3a2b471bd2b0630c4eeb",
    "signature": "0x083f818b7d179f75b4621f47947235e275a7ece5dde0a94bf0bd0310b100e9a7410b457353c267b5973a77f2e95305ff9770b99e806ed6789ba0e3de1a32f1f51c",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}