{
  "manageEntity": {
    "action": "Save",
    "entityId": "1244026420",
    "entityType": "Track",
    "nonce": "0x458c7397e7bd824fffd1c6cbc40ef4dcbc6b7ee2c550ede7ecca461fca3c72e4",
    "signature": "0xcdbd9eacb42a61debde115570722b230e6ceb97bc3b902f37b70006fdb117d635ff7a2ad1019d554e2fa47abd01dce7bc8bdbda226f59283c120ab7af32bb2d91c",
    "signer": "0xC6f6979d7215C4611Cd7aDb30a42B2812294262c",
    "userId": "55290787"
  }
}