{
  "manageEntity": {
    "action": "Save",
    "entityId": "1165815717",
    "entityType": "Track",
    "nonce": "0x52975b53949c0cc5b7f8a9bcb99f60afcc928212165dee9706b27f06f2b7decf",
    "signature": "0x95d603faf4c3afd5cdd64dd5c717d19215a558b5ff7ee2360fb6103f5a354edf10ae475a3329d2b33af46c313421d947a2ab9882c3b8eabc6a08ab0face0e0601c",
    "signer": "0xF7628Ea36C0C266E289b7538b033fB949A6C31ff",
    "userId": "386745392"
  }
}