{
  "manageEntity": {
    "action": "Save",
    "entityId": "1324985832",
    "entityType": "Track",
    "nonce": "0x677ddda3580e1aeb3ca5ff66c9b3560f11bd9ea123a9e69b2dec622b725d6f2f",
    "signature": "0xceb359b4dc1b5b43d5a636ab1ea9d75b63bf079fa40911df048645c9ed8205b15c080334ca43c528c2429c9d090704eddf2e451e47a30dd8633ba36c69bfe6d21b",
    "signer": "0x2D566E1DaC6fc148a694abe846B32e39B6584aa5",
    "userId": "890889753"
  }
}