{
  "manageEntity": {
    "action": "Save",
    "entityId": "920625029",
    "entityType": "Track",
    "nonce": "0x0519f4d1c664906c955c736efae6f15a9df3084934f91f0873c78c43bee69292",
    "signature": "0x9bacb40368280f515cd25f8a765145a1d3a6a029f1e5102aa0141725f28ecc5b0de846f3512ce3fabfb74c6861014d61f86f6b3d31f827af7b6b2ba9176e1b5e1b",
    "signer": "0x0b901AE3Eb7b439095858D82Ff194CfeD0Fd3396",
    "userId": "167557"
  }
}