{
  "manageEntity": {
    "action": "Save",
    "entityId": "331380532",
    "entityType": "Track",
    "nonce": "0x46a3f26c3004740a6e1e3a9558bb3a9663aef3f0367b1a12fa9026d2b66f8d78",
    "signature": "0xc51bfa676138b38997a1eafdd2be6e26df3078799432f06df109736a7b9553792e71192ae862add01a0eaa213c351cc7435179c0a935eb7ec18389a9a455ef981b",
    "signer": "0x43dA66b40816c8fb9e2B0AA77E0643192169AF14",
    "userId": "636236864"
  }
}