{
  "manageEntity": {
    "action": "Save",
    "entityId": "1546285837",
    "entityType": "Track",
    "nonce": "0x5184b1544027b4b7d7a178941179f7f74ed45dc9f5900ba8b6e7147dd1feeb34",
    "signature": "0x319952595c827ebbf228c395b29484b7f45192a8b4929214812aef78b0fa16a459e8008fdde359fcc433b3d7d5a3b424f594cd8e678f41e959be244d243471661b",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}