{
  "manageEntity": {
    "action": "Save",
    "entityId": "1307193653",
    "entityType": "Track",
    "nonce": "0xc04dd76354bf619bb32800910ca947fbb28b95bbc6376001aa7ef16efb42f96a",
    "signature": "0x60269ff85f7394155b4ddc5294478d64bfb74e1add537c8c58587f0601686a976ecc09e4f9372853700db7c95d9cf591d5499a9e4feedfc95974596d14ec394b1b",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}