{
  "manageEntity": {
    "action": "Save",
    "entityId": "1118785620",
    "entityType": "Track",
    "nonce": "0xded4bf10729914a8ca1b9b02e940d67d199bc6c800ffee1780961880bb6494a7",
    "signature": "0xa37b707b2e5c9e78682d76b251e03eb93541ba19dfc1f175fc6a4e517f44a78130b81c19eb6659d572679a662156806eb15d0d81b274bd7dc1a581664227fbbf1c",
    "signer": "0xe5223Dc6E411A24e22DcF917955e97a8D7479d0c",
    "userId": "981716494"
  }
}