{
  "manageEntity": {
    "action": "Save",
    "entityId": "1155063455",
    "entityType": "Track",
    "nonce": "0x05e313e741db0d04f980952edadd99861efc2f27e9ef7afce23842abe224e12b",
    "signature": "0xe57b515f719aca64652fd7a4be2b9b51fd3946cd56d4371bd7270cbf7793baa9303686233bf846fc79712669e0328b0a5154beeb28fb9efece5254947586651b1b",
    "signer": "0xb6B208a8f79b1D88d245afa5aDB0a40d38cd6DD1",
    "userId": "528688046"
  }
}