{
  "manageEntity": {
    "action": "Save",
    "entityId": "2040972744",
    "entityType": "Track",
    "nonce": "0x9c00b00238742b0d80766baa42c0d7ac33dbe1fe09da983cfcf631766c52bcdf",
    "signature": "0xaf420e2e2664b1aa86c1ba13c6ace699683a253a5f48c1dc55f317f4b42f0bc74150f90d6be9feeb4780adb84052e043e5dd1cfac4425156483caf5f6bf3b9ad1b",
    "signer": "0xD24271e3B8CCFB603860EA392E94eD5AE2538703",
    "userId": "456716469"
  }
}