{
  "manageEntity": {
    "action": "Save",
    "entityId": "270501277",
    "entityType": "Track",
    "nonce": "0xea2ee129b29087fb263c95973f3482248eed1064d33838906060585f7defc384",
    "signature": "0xa9fefd821affe6f3f90723fa9a1bf0d126bef4af134dfeea3c5dc8a5d92a421b082d9731f4a91060cef1a73fdcb316e8a16759f1b0728d74b5449796586d41b11c",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}