{
  "manageEntity": {
    "action": "Save",
    "entityId": "1733622558",
    "entityType": "Track",
    "nonce": "0xc6f0a874d1c79e423a52f60957c3f6ac834e61564ed657ae30bbc4e43b5f2ae6",
    "signature": "0xa89f1a11201c889ac83ba85e3c94d57a3f95d5762941780f20a4edff59d3469441dec02781d1bce9906c322b1070b00626f85bb6ae2ba5456e52e250a9b028941c",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}