{
  "manageEntity": {
    "action": "Save",
    "entityId": "2009433913",
    "entityType": "Track",
    "nonce": "0x667dafcdbb99f4d86fbf981d2caa6af75f9a0d0cb094716441c18f0abd179581",
    "signature": "0xfdfba83e79d9b70da4ede9c687fcda6ad50e9b165014c3e52d82291f0c7f046533762475eff037bcbc586fe672b1c0577b9ca3aa498d375011505743eeb0582e1b",
    "signer": "0x43dA66b40816c8fb9e2B0AA77E0643192169AF14",
    "userId": "636236864"
  }
}