{
  "manageEntity": {
    "action": "Save",
    "entityId": "1041250305",
    "entityType": "Track",
    "nonce": "0xbb1ddf7e5778c7d24596e1da024092c56e16a8182f057f8fd0718c71bea22c57",
    "signature": "0x2113e7708834ae5eb6a5bdc93fbbf484add1d759b9dfce31f39dec2cf096dc530b4c9fcb4adc7c53cc6c003eac87f83320fe1f52790e34f8baf8434a819db2db1c",
    "signer": "0x43dA66b40816c8fb9e2B0AA77E0643192169AF14",
    "userId": "636236864"
  }
}