{
  "manageEntity": {
    "action": "Save",
    "entityId": "1951287884",
    "entityType": "Track",
    "nonce": "0xebe5bdca5d371a2ae5924bdb9597ffa9d7a84372463ee58a9b1c5611e33f3505",
    "signature": "0xae9260270a59065ec505a09f946a77c616b486e9bc791bacf18761e1c45775917348c9f13ea83e974e802a67810e1ac6b28277d977e489ff87184729ddf703bc1c",
    "signer": "0x43dA66b40816c8fb9e2B0AA77E0643192169AF14",
    "userId": "636236864"
  }
}