{
  "manageEntity": {
    "action": "Save",
    "entityId": "1935208464",
    "entityType": "Track",
    "nonce": "0xfd22ed561e02bbf15714890e0060f07504fe2f0b4299ef4696554fb47fc6a833",
    "signature": "0x4adac458ef3a562aa35bbed64251e4c1dfe5dced06cfe0e8d6855ce2a9c9e96530bf1d80eb5bf6a8dd5fee75a24a17e0259f575693ea5147ee36456f1ead8b5e1c",
    "signer": "0xE7D37531a757aEaf8B2c8037a79C03819edc20Dc",
    "userId": "870684573"
  }
}