{
  "manageEntity": {
    "action": "Save",
    "entityId": "81227875",
    "entityType": "Track",
    "nonce": "0x326ffd3cdb2e535e32e3d86999b510123d7ec77ea005a03a5fac048a9d74847c",
    "signature": "0x1d65a0edf5351adcdca021117f1a5923ec8f79f32642d1506fb38e932472bcb918473f8d5465b95fa48c14fe28fdb24b4fc06bcc120da9975b4cc138117c1c161c",
    "signer": "0x43dA66b40816c8fb9e2B0AA77E0643192169AF14",
    "userId": "636236864"
  }
}