{
  "manageEntity": {
    "action": "Save",
    "entityId": "125841673",
    "entityType": "Track",
    "nonce": "0x077cca42cb5e7f2ce0760a70089cadb371e6444b63cc51a4945fd7676b9b7e5e",
    "signature": "0x7d82fc3a92701db520468d77b18b08ca3884c1b8ad3f1f6182df3e4d6877594073035223902aa643579167f1c0ae13866763b483f122514c591b1d42ca681df91b",
    "signer": "0x0b901AE3Eb7b439095858D82Ff194CfeD0Fd3396",
    "userId": "167557"
  }
}