{
  "manageEntity": {
    "action": "Save",
    "entityId": "154960",
    "entityType": "Track",
    "nonce": "0xf99c278deab90ee34ab11c2009ddefebca4a1cade4f63ef86764fc8a65fc2130",
    "signature": "0x1e6c67a6f82b8d6cea78baf55d9f331d4cde96acfbaf6ced134ac722b2592e5c723ea894586d36242c68aedc39d87c68b0dab931c22210e815c9e4051ccf47961b",
    "signer": "0x12705C8Fe8CE886CeFEFa0d4d46E906f2c35C954",
    "userId": "477934274"
  }
}