{
  "manageEntity": {
    "action": "Save",
    "entityId": "430216653",
    "entityType": "Track",
    "nonce": "0x576b1ce5dbbfa223f5715ea45952bafaa1de780ba8db53c381d71f268a644165",
    "signature": "0x65c972a82a44323121b09ae5dca5cf3178e478d99f0c9a4012bf6f3360125db05c06ef354f13482551ec89648a048f71a0f284f62057ff07be369755bbe24ad21b",
    "signer": "0x43dA66b40816c8fb9e2B0AA77E0643192169AF14",
    "userId": "636236864"
  }
}