{
  "manageEntity": {
    "action": "Save",
    "entityId": "1070000",
    "entityType": "Track",
    "nonce": "0xef8932bfbca261a443414cc2a30ab46475c7404b5c59ec6aa3991f68f0c8a077",
    "signature": "0x8a8906c8aa00ba110c6e80567f93870d3efeffdfab00a31e1dead4e6feb80bd866bf27bf3046302723bd5f73f1f6f2177ee568ab98f56ebb4c175a5d8594f1cd1c",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}