{
  "manageEntity": {
    "action": "Save",
    "entityId": "1999875311",
    "entityType": "Track",
    "nonce": "0x4ea59bc99858019de13ee6dc25863f8727dd77197acbffaff68fbf50257736ae",
    "signature": "0x7c0aa203426d133ded83e224c315dc46b1fee90aff4fe9066ad7ed28548c4b653c101ee67202203fa4b2fa227df65c4b40f7a6d62ccde5f2bebd68eaab068da91c",
    "signer": "0x44BAdCFCf42113CbB67f519e4efa576B336f9bf7",
    "userId": "136844578"
  }
}