{
  "manageEntity": {
    "action": "Save",
    "entityId": "2004028574",
    "entityType": "Track",
    "nonce": "0x518333f421ca4b3fe77c3bc08e4874da6e19288a8fcfd7dbb8974a070a6a9288",
    "signature": "0x0d448aa6cf8ef58502b14513da85db0cb111bbd735893906d298be677ec0709f15bbc6d20d80da112c612219b82320cc1190f7a8f8996cb4909e0439e6c419591b",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}