{
  "manageEntity": {
    "action": "Save",
    "entityId": "1757428858",
    "entityType": "Track",
    "nonce": "0x36bb99cd3096d19c04603bdb9c3833460ce21182bf4b29dd2aa58dd1a66572cb",
    "signature": "0x4dcab1814309fe819a55207cb323a933bf41de9a44a3cbef2f6424c60bef417633fca13aa5de1905cbd328a22ac45284653f2987bb7da3a33db00bacb0b1af1d1c",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}