{
  "manageEntity": {
    "action": "Save",
    "entityId": "493615",
    "entityType": "Track",
    "nonce": "0x1e88653a13e2f7d3ac0bdad40d363c5eb81752a923d76e6c53aab94c4a7a1167",
    "signature": "0xd68b50d111dc4e3e1522b3312dde19869882b89f72fdc9a7b4d91d78b94807e044a2d6f833f2b93368421678ad91b53d5466d9674b84bed2ac0655b33b6ba3351b",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}