{
  "manageEntity": {
    "action": "Save",
    "entityId": "88012",
    "entityType": "Track",
    "nonce": "0xf9f378e4a7cb4e3bbe7fd82a21bb47ef71ee4dd676bf1da94703641eae433305",
    "signature": "0x52b5a096e17932910da848e49fa7cd54dce599dcdaf7ef7edc68189e46309e303be0a89e66019d0ec2873899432ed83d5da610bb19563359ec462ad90302f25e1b",
    "signer": "0x84B42609E987DD0953e02498E61987fB833B7C92",
    "userId": "887547386"
  }
}