{
  "manageEntity": {
    "action": "Save",
    "entityId": "242739916",
    "entityType": "Track",
    "nonce": "0xeaf773873e4ff7138859df397265482aa255779b4d1741341bd34d6d3ca41e2b",
    "signature": "0x2d16f5d54cfcc50ce122f2a0aa922677a4af4d26eb7b950c77a0101641f285ed447985dfe9e6a6de107d46172a97e52a028a3617ea0c50d9f589671cf0eb02bd1b",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}