{
  "manageEntity": {
    "action": "Save",
    "entityId": "534474",
    "entityType": "Track",
    "nonce": "0x22b47a09e1712506c848575337f89422ba8ddedb86bc98521329478a175d662e",
    "signature": "0x30e4cc5cfe23eb85fd6a93403ed5f4bc06aa4364f7fa1e96f8f83061793fc6be42532f4b3391362cbc8788331a3c11dd750fe102a759c67fe78611578578caa81b",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}